Detective Inspector, Jim Park said: “We're especially keen to speak to any shift workers who may use this as their route to or from work and who may have seen something that could help our investigation.”

Anyone who may have more information is asked to contact DI Jim Park at Southampton Central Police station on 101 quoting Operation Imogen or via the website.

You can also call the charity Crimestoppers line on 0800 555 111 where information can be left anonymously.